> LibreSoC scalar instruction set (klick)

"Power ISA Scalar (SFFS) has not been significantly advanced in 12 years"

Power ISA v2.06 was released 14 years ago, v2.07 10 years ago. Everything happened 12 years ago apparently, always ;-)
(Besides, the current compliancy subsets including SFFS were first published as such with Power ISA v3.0C as recently as 3 years ago.)